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20109 Alicelandis (1995 RJ)
Classification: Main-belt Asteroid          SPK-ID: 2020109
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2370264558048029 7.8505e-08  
a 2.580274395157392 2.5884e-08 AU
q 1.968681100269354 2.1314e-07 AU
i 9.271173004426391 8.4701e-06 deg
node 103.5263104979962 5.6613e-05 deg
peri 215.8216897270229 6.2732e-05 deg
M 257.6065598207525 3.1814e-05 deg
tp 2457431.092934966823
(2016-Feb-12.59293497)
0.0001381 JED
period 1513.900268578664
4.14
2.278e-05
6.237e-08
d
yr
n .2377963776557016 3.5782e-09 deg/d
Q 3.19186769004543 3.202e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      13499 days (36.96 yr)  
   first obs. used      1978-07-07  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .669  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:26:24  

Additional Information
 Earth MOID = .964314 AU 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO337428  

20109 Alicelandis           Discovered 1995 Sept. 12 by J. L. Tonry at the Michgan-Dartmouth-MIT Observatory.
Alice Landis Tonry (b. 1921) was a graduate of Tufts Medical School, as well as a realtor, farmer and mother.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

[ show close-approach data ]
Alternate Designations
 1995 RJ = 1978 NT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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